Yassiada is a macro heaven. Water is little bit cold down from 18 metres. Navy is on the island. Visibility is low. Beginning from 25 metres you can see soft corals. You can dive @ Yassiada with daily dive trpis.
Facts about Yassıada/Istanbul

• It is in Turkey
• Yassıada/Istanbul is in the Sea of Marmara.
• The typical depth is 0-30 Metres 0-100 Feet.
• The typical visibility is 0-3 Metres 0-10 Feet.